4 ms·
You don't get extra life that way; the total number of gigabytes you can write (including rewrites) is the same.
by jimrandomh 9y ago
You don't get extra life that way; the total number of gigabytes you can write (including rewrites) is the same.
- wmf 9y agoFTLs are nonlinearly more efficient with more free space (like how GCs are more efficient with more heap available), but exactly how much extra endurance this translates to would depend on the particular SSD and generally isn't documented. For example, Micron has an 11 TB SSD with 16 PB endurance and a 6.4 TB SSD (that may have ~11 TB of flash) with 35 PB, so giving up 40% capacity gives 120% extra endurance.
- jimrandomh 9y agoNo, that's incorrect. A naive write-balancing algorithm might concentrate writes into a small subset of sectors when free space is low, but a properly designed firmware will move things around to prevent that from happening. And in any case, that's a matter of free space, not total space.